class B1{
int n;
static int sum=0;
void setN(int n){
this.n=n;
}
int getSum() {
for(int i=1;i<=n;i++)
sum=sum+i;
return sum;
}
}
public class A2{
public static void main (String args[]){
B1 b1=new B1(),b2 = new B1();
b1.setN(3);
b2.setN(5);
int s1=b1.getSum();
int s2=b2.getSum();
System.out.println(s1+s2);
}
}
